Geologic Time...Learn about the age of the earth and how we know through the links of this page. Did you know the earth is over four billion years old? How long do you think humans have been around? Do some research and find out by using the links below the picture. Spiraling timescale chart of life on Earth. WIKIMEDIA COMMONSUse these first few resources to help you with the Geologic Time Scale Research -

Geologic Eras for Kids- This is a great site with which to find the basic information you need about your assigned geologic period.